Who: IOC boxing judges
Olympics: Seoul 1988

When a boxer outhits their opponent 86-32, that’s an ass kicking and automatic victory unless you’re Roy Jones Jr. fighting a South Korean in South Korea. Despite dominating Park Si-Hun, Jones lost the decision 3-2. Si-Hun apologized to Jones for the inexplicable decision. Later, it came out that South Korean officials had bribed the judges. Even with all the fuckery, the IOC has never reversed the decision.